TWI779184B - Aerodynamic assembly for bike handlebars - Google Patents

Abstract

The invention proposes an aerodynamic assembly for bike handlebars, including two distinct extension devices (4a, 4b), each of the two extension devices (4a, 4b) comprising: a first armrest-forming part (5a, 5b), able to be fastened on a transverse bar of a bike handlebars (1) while extending longitudinally forwards and including a longitudinal extension (6a, 6b) forming a free end portion, an upper surface of the first part with its longitudinal extension forming a receiving surface for a forearm part of a cyclist; and a second extension-forming part (8a, 8b), able to be fastened, in a removable manner and in the extension of the first part (5a, 5b), to the free end portion, the second extension-forming part (8a, 8b) being able to slide longitudinally relative to said longitudinal extension (6a, 6b) so as to allow an adjustment of a distance separating a free end of the second extension-forming part (8a, 8b) from the first armrest-forming part (5a, 5b).

Description

Aerodynamic Assembly for Bicycle Handlebars

The present invention relates to bicycle handlebars, such as time trial or triathlon bicycles, and more particularly to extensions that can be used with the handlebars of such bicycles.

Handlebars for time trial bikes allow the cyclist to have two different positions, the first position is to put the hands on the handlebar handlebars, which is the position normally used by cyclists when starting or accelerating, and the second position Rest the forearm on the elbow rest with the hand on the extension. This second position is used by the cyclist to maintain cruise control while helping the lower torso and bringing the cyclist's hands and elbows together, thus improving aerodynamics.

In addition to the handlebar part, it traditionally has a crossbar that is fixed to the bicycle, usually by means of a handle, with an area at each of its two ends to hold (a handlebar), such as is used for time trial bicycles. Handlebars generally include: two extensions fitted to the handlebar, on either side of the stem, each extension terminating in an area for gripping; Two elbow rests, each associated with the extension, serve as support for the cyclist's forearm when the cyclist places his hand on the gripping area of the extension.

Known embodiments can basically be divided into four types: According to a first type of embodiment, the two extensions for the same handlebar in one hand and the two associated elbow rests in the other hand are separate parts from each other. In this case, the extension is generally fitted to be adjustable for the handlebar. A variation in the spacing between the two extensions can thus be obtained, for example by fixing the extensions at different points across the width of the handlebar. The extension can also be fitted to swivel on the handlebar to allow its adjustment to the inclination of the handlebar. One or more wedges of different heights may be used at the fixed point of the handlebar and each extension to allow adjustment of the height of the extension to the handlebar. For this type of extension, usually in the form of a long tube, straight, S or elbow in shape, the length of the extension to its fixed point on the handlebar can generally only be adjusted by cutting off the tube of the extension . According to known embodiments, the armrest is fixed alternately on the handlebar, or on an extension, possibly with wedges for height adjustment.

In one example, document EP 2 402 240 describes a pair of extensions, wherein each extension is fixed to the crossbar of the bicycle handlebar, and an armrest is fixed to each extension, for the crossbar of the handlebar move back.

A second type of embodiment consists of monobloc pieces, in which each extension is located in the extension of its associated armrest inside the single piece, which is fixed to the handlebar. In the known embodiment, only the inclination of each extension with respect to the bar of the handlebar and the distance between the two extensions can be adjusted, but not the length of the extensions.

A third type of embodiment, such as described in document US 2010/0326232, comprises the example of a monobloc plate, the H-shape of which unites the two extensions and the two associated armrests, where The plate can be secured to the crossbar of the handlebar. In this type of plate, adjustments in the distance between the extensions or in the length of the extensions are not possible.

Finally, more recently, a fourth type of embodiment has been proposed, based on a monolithic handlebar integrating conventional handles, armrests and extensions in extensions of the armrest. The handlebars are made to measure to fit just one cyclist and produced by 3D printing. Therefore, a posteriori adjustment is not possible. This monoblock handlebar is more ergonomic and aerodynamic than previous solutions, but it is not suitable for a large number of cyclists.

The object of the present invention is to propose an assembly comprising two distinct devices, the structure of which has improved aerodynamics compared to existing solutions, while at the same time allowing in particular the adjustment of the length, making it possible to adapt to a large number of different configurations. bike rider.

More precisely, a first object of the invention is an aerodynamic assembly for a bicycle handlebar, comprising two distinct extension means forming a first left extension means and a second right extension means, which Characterized in that each of the two extension means comprises: The first armrest forming part, when extending longitudinally forward, can be fixed on the crossbar of a bicycle handlebar, and comprises a longitudinal extension forming a free end, the first armrest forming part and its longitudinal extension The upper surface of the member forms a receiving surface for the forearm portion of the cyclist; and a second extension forming part movably fixed to the free end in an extension of the first armrest forming part, the second extension forming part being slidable longitudinally relative to the longitudinal extension, to allow adjustment of the distance separating the free end of the second extension forming member from the first armrest forming member.

In addition to the main properties already mentioned in the preceding paragraphs, the assembly according to the invention may have one of the following or complementary properties: For each of the two extension means, the upper surface of the second extension forming member is preferably substantially in extension of the upper surface of the first member to longitudinally increase the accommodation for each forearm of the cyclist surface; For each of the two extension means, the upper surface of the first member and the upper surface of the second extension-forming member may be substantially flat or concave to conform to the shape of a forearm; For each of the two extension means, the lower surface of the second extension forming member is preferably substantially in the extension of the lower surface of the longitudinal extension member, and the lower surface of the second extension forming member and The lower surface of the longitudinally extending member is preferably convex; For each of the two extension means, the second extension forming member and the longitudinal extension may advantageously have complementary cross-sections, for example substantially triangular; For each of the two extension means, the second extension forming part can be fixed and slide longitudinally inside the longitudinal extension; in a variant, the second extension forming part can be fixed and inside the longitudinal extension externally slides longitudinally; For each of the two extension means, the first armrest forming part is preferably configured to be fixed to the bicycle handlebar by means of an adjustment system; Each adjustment system can make at least one of the following adjustments: Adjustment of up and down translation, allowing adjustment of the height of each first armrest forming part with respect to the crossbar of the handlebar; Adjustment of front and rear translation, allowing each first armrest forming part to be set more or less forward or rearward with respect to the crossbar of the handlebar; Adjustment of left and right translation, allowing adjustment of the spacing of the first armrest forming parts along the crossbar of the handlebar; The adjustment of the rotation in the horizontal plane allows the adjustment of the toe angle between the two extension devices; Adjustment of rotation allows adjustment of the support angle of the forearm with respect to horizontal. Each of the two extension means preferably includes a foam cover capable of removably covering the containment surface; For each of the two extension means, one of the ends of the second extension forming member is preferably flattened and has an ergonomic shape in which the palm of the cyclist can be supported; Each flattened end may be provided with a through hole, allowing the removable fixation of the handle; Each handle is preferably pivotally mounted; Each handle may comprise, in the lower part, a gripping part and fixing ears, the gripping part being at an angle to the fixing ears; The handles are interchangeable to adjust the toe angle between the handles.

Another object of the invention is a bicycle handlebar, characterized in that it comprises the assembly according to the first object.

In the continuation of the description, unless indicated otherwise, common elements in all figures are denoted by the same element symbols.

Figures 1 and 2 show an aerodynamic assembly for a bicycle handlebar 1, in exploded view and assembly position, respectively. A bicycle handlebar 1 traditionally comprises a crossbar 2, the middle part of which is fixed to the bicycle, generally through the use of the stem. The crossbar 2 is extended at each of its ends by areas or handles 3a, 3b for gripping. These handles extend towards the front of the bicycle (substantially in the longitudinal direction of the bicycle), indicated in the drawing by the longitudinal axis XX'. In the following and subject to express exceptions, the index "a" used in the element numbers in the drawings indicates the part intended to be located to the left with respect to the longitudinal axis XX', the index "a" used in the element numbers in the drawings b" denotes a portion intended to be located on the right with respect to the vertical axis XX'.

As can be seen especially in Figure 2, the aerodynamic assembly comprises two distinct extension means, named first left extension means 4a and second right extension means 4b.

According to the invention, each of the two extension means (left 4a and right 4b) comprises a first armrest forming part 5a, 5b, capable of being fixed to the crossbar 2 of the bicycle handlebar 1 while extending longitudinally forward. Each first part 5a, 5b comprises a longitudinal extension 6a, 6b forming an end portion which is not secured before assembly (see Fig. 1). The upper surface of the first part 5a, 5b together with its longitudinal extension 6a, 6b forms a support surface for the part of the cyclist's left or right forearm. This support surface can advantageously be covered by a foam cover 7a, 7b of the same shape to provide comfort to the cyclist, the cover is preferably removable, as shown in Figure 1, so that it can be easily replaced and/or or cleaning.

Each of the two extension means (left 4a and right 4b) further comprises a second extension forming part 8a, 8b which can be fixed to the longitudinal extension 6a in a movable manner and in extension of the first part 5a, 5b , The free end of 6b.

The first armrest forming part 5a, 5b and the second extension forming part 8a, 8b are preferably made of carbon fiber.

The second extension forming part 8a, 8b can be further slid longitudinally with respect to the extension 6a, 6b to allow (as described later) to align the free end of the second extension forming part 8a, 8b with the first armrest forming part 5a. , 5b The adjustment of the separation distance. In the embodiment shown in the figures, the second extension forming part 8a, 8b can be fixed inside the longitudinal extension 6a, 6b and can slide longitudinally inside the longitudinal extension 6a, 6b. However, according to a variant not shown, it is possible to envisage that the second extension forming part can be fixed outside the longitudinal extension 6a, 6b and can slide longitudinally outside the longitudinal extension 6a, 6b.

As can be seen more particularly in Figures 1 and 3, each second extension forming part 8a, 8b can be fixed to its associated first armrest forming part 5a, 5b by means of a screw and plate system. More precisely, a bottom plate 9a, 9b (equipped with two threaded through holes) is provided at the first hollow end of each second extension forming part 8a, 8b, and two screws 10a, 10'a, 10b, 10'b passes through the top plate 11a, 11b and the longitudinal extensions 6a, 6b to be fixed in the threaded through hole of the bottom plate 9a, 9b. A number of boreholes 12a, 12b (regularly spaced at a distance corresponding to the distance separating the threaded through-holes of the base plates 9a, 9b) are advantageously spread over the upper surface of the second extension forming part 8a, 8b . Each cyclist can thus make a first adjustment of the insertion length suitable for the morphology of his forearm. For this first adjustment, it is necessary to intersect the ends of the second extension forming members 8a, 8b between two consecutive boreholes 12a, 12b beforehand. A more detailed adjustment in length can advantageously be achieved by envisaging, as shown in FIG. 3 , that the top plates 11a, 11b can be translated longitudinally (on top of the longitudinal extensions 6a, 6b) inside the (rectangular) openings 13a, 13b. extension) is obtained.

Furthermore, for each of the two extension means 4a, 4b, the upper surface of the second extension forming part 8a, 8b is preferably substantially in the extension of the upper surface of the first part 5a, 5b. This makes it possible to longitudinally increase the receiving surface of each forearm of the cyclist.

In an embodiment variant not shown, the upper surface of the first part 5a, 5b and, by extension, the upper surface of the second part 8a, 8b are substantially flat.

In the preferred embodiment shown, for each of the two extension means 4a, 4b, the upper surface of the first part 5a, 5b and the upper surface of the second extension forming part 8a, 8b are concave so that , allowing it to best conform to the shape of the forearm for the most part (perhaps throughout its length), as can be seen especially in Figures 4 and 5. It achieves improved comfort and perfect support for the forearm.

Furthermore, for each of the two extension means 4a, 4b, the lower surface of the second extension forming part 8a, 8b is preferably substantially in the extension of the lower surface of the associated longitudinal extension 6a, 6b, the second The lower surfaces of the two extension forming members 8a, 8b and the lower surfaces of the longitudinal extensions 6a, 6b are advantageously convex to form a windward apex.

In the illustrated embodiment, and for each of the two extension means 4a, 4b, the second extension forming member 8a, 8b and the associated longitudinal extension 6a, 6b have complementary cross-sections, preferably substantially triangular , especially visible as region 14 indicated by dashed lines in FIG. 3 . This choice of section offers the possibility for the cyclist to place his forearm in contact with a substantial part of the length of the extension device 4a, 4b with improved aerodynamics, as can be seen with the solid arrows in figures 5, 6 and 7, which Show the trajectory of the wind around the cyclist's forearm as the bicycle travels.

The ends of the extensions 8a, 8b on opposite sides of the handlebar 1 are preferably flattened, inclined towards the inside with respect to the vertical, and provided with through-holes 15a, 15b (see Fig. 1 ) to allow the movable handles 16a, 16b fixed. Each handle 16 a , 16 b is advantageously pivotally fitted to allow adjustment of inclination, for example by cooperation of a fastening nut 17 , a thrust washer 18 and a locking screw 19 . As can be seen especially from Figures 1, 8a and 8b, the handles 16a, 16b have an angle β of several degrees between their fixing ears 20a, 20b at the lower part and at the part for gripping. Each handle can thus have its axis turned 180° before it is secured or otherwise assembled, and the handles 16a, 16b can be reversed as shown in Figures 8a and 8b. In either case, a modification of the toe-in position (inclination with respect to vertical) of the handlebars is obtained.

The flattened area of the end of the handlebar 1 with respect to the extension forming parts 8a, 8b has an ergonomic shape 21a, 21b on which the palm of the cyclist can be advantageously supported (see in particular paragraphs 1 and 2). picture).

In the preferred embodiment shown in the drawings, the first armrest forming part 5a, 5b of each of the two extension devices 4a, 4b is configured to be fixed to the bicycle handlebar 1 through the use of an adjustment system , the preferred embodiment of which allows a large number of adjustments (in addition to the adjustment of the sliding of the extension forming member with respect to the armrest forming member and the aforementioned adjustment of the toe angle of the handle), which will be described shortly.

In this embodiment, each adjustment system includes (especially see Fig. 1): The top plates 22a, 22b which are arranged on the respective first armrest forming parts 5a, 5b during assembly; Brackets 23a, 23b and bracket supports 24a, 24b intended to be arranged under each first part 5a, 5b facing the top plate 22a, 22b when assembled; A set of several (in the example at least three) wedges 25a, 26a, 27a or 25b, 26b, 27b of variable height, preferably equal to 5 mm, 10 mm and 20 mm respectively; Locking screws 28a, 28b for assembling top plates 22a, 22b, brackets 23a, 23b and bracket supports 24a, 24b to armrest forming parts 5a, 5b.

As shown in Figure 1, and especially visible in Figure 9, the wedge allows each cyclist to adjust each of the extension means 4a, 4b with respect to the crossbar 2 of the handlebar 1 at the first armrest forming parts 5a, 5b fixed height. By providing two 5 mm wedges, two 10 mm wedges and four 20 mm wedges for each set of right and left wedges (note that the wedges are interchangeable and can be used for the right or left), depending on the combination of wedges used, the choice of variable heights of 5 mm, 10 mm and 20 mm makes it possible to advantageously obtain heights ranging from 0 to 55 mm at intervals of 5 mm. The diagram shown in Fig. 9 corresponds to a height adjustment of 35 mm (used in combination of three wedges 25a, 26a, 27a and 25b, 26b, 27b). In this embodiment, the adjustment system and consequently the associated extension means can be fixed in two dedicated areas 29a, 29b of the crossbar 2 of the handlebar 1, preferably by means of fastening bracket supports 24a , 24b using two screws 30a, 30b (the length of which depends on the number of wedges used during assembly), and through the use of support plates 31a, 31b, it is possible to protect the material of the handlebar 1.

As shown in Figures 1, 10a, 10b and 11, each top plate 22a, 22b, brackets 23a, 23b and bracket supports 24a, 24b are assembled to the armrest forming parts 5a, 5b through the use of locking screws 28a, 28b. This is done through longitudinally extending (rectangular) openings 32a, 32b in the first armrest forming parts 5a, 5b. Each cyclist can thus direct the armrest forming parts 5a, 5b along an axis transverse to the stem 2 of the handlebar 1 toward Move forward or backward. Figures 10a, 10b The above views show two extreme positions, a first position in which the first parts 5a, 5b are fully retracted towards the rear of the crossbar 2 (Fig. 10a), and a position in which the first parts 5a, 5b 5b is fully oriented towards the second position of the bar 2 (Fig. 10b). A total range D _max (for example equal to 55 mm) for forward and backward translation can thus be obtained. The top plates 22a, 22b may advantageously include indicators for precise positioning of graduated scales (33a of Fig. 11) to assist the cyclist in fore and aft translational adjustments.

As shown in Figures 1, 11 and 12, the (rectangular) openings 32a, 32b extend longitudinally in casings 34a, 34b of the first armrest forming parts 5a, 5b, which casings 34a, 34b advantageously have a diameter greater than The width of the width of the top plate 22a, 22b. The two extensions 4a, 4b are thus pivotable about the top plate 22a, 22b (which acts as a stop), which allows each cyclist to adjust the toe-in between the two extensions 4a, 4b before the locking screws 28a, 28b are tightened angle (angle θ in Figure 12). By correctly sizing the width of the shells 34a, 34b with respect to the width of the top panels 22a, 22b, for the toe angle θ, for example, from -7° to +7° around the longitudinal axis of the rectangular openings 32a, 32b A range of ˚ can be obtained.

The adjustment of the left-right translation of the respective first armrest forming parts 5a, 5b (parallel to the crossbar 2 of the handlebar 1) is also possible by means of the adjustment system, which will now be explained:

Fig. 13 is an enlarged view of the bracket support 24a of Fig. 1 . Bracket support 24a has the shape of a generally inverted capital L, the bottom 35a of which is concave in shape to cooperate with the convex surface below the associated bracket, and by means of two parallel rows facing each other The hole pierces and extends along the bottom of L (parallel to the crossbar 2 of the handlebar 1 after assembly) to form a pair of compliant locking screws 28a. More precisely, it is possible to choose to tighten the locking screw 28a in the pair of holes 36a, 36'a, or in the pair of holes 37a, 37'a, or in the pair of holes 38a, 38'a. The other branch 39a of the inverted L is provided with two other through-bore openings 40a, 40'a capable of receiving locking screws 30a (Figs. 1 and 9). Bracket support 24b is identical in structure to bracket support 24a. However, as can be seen in Figure 1 , bracket support 24a has its bottom offset to the left (relative to the point used for fixation by locking screw 31a), while bracket support 24b has its bottom offset to the right. The two supports 24a and 24b are advantageously interchangeable between the two extension means 4a, 4b, so that six possible fixing points of the first armrest forming part 5a, 5b for adjustment in translation from side to side are obtained are possible.

Furthermore, the shells 34a, 34b with their associated (rectangular) openings 32a, 32b extend parallel to the longitudinal axis of the first armrest forming parts 5a, 5b, but are also offset relative to this longitudinal axis (for part 5a offset to the left and offset to the right for part 5b). The two first parts 5a, 5b are also advantageously interchangeable, ie the first part 5a can be fixed to the bracket support 24a or to the bracket support 24b and the first part 5b can be fixed to the bracket support 24a or to the bracket support 24b. to bracket support 24b. The interchangeability of the two bracket supports 24a, 24b in one hand and the two first parts 5a, 5b in the other results in obtaining (in a preferred but non-limiting embodiment) adjustment for translation in left and right Possibility of fixing positions of up to eleven possible first armrest forming parts 5a, 5b (parallel to the crossbar 2 of the handlebar after assembly). Each cyclist can thus find out the spacing between the armrest forming parts which best corresponds to his configuration. In a preferred embodiment, according to the distance between the holes 36a, 37a, 38a (or 36b, 37b, 38b) and the offset of each casing 34a, 34b relative to the longitudinal axis of the parts 5a, 5b, the parts 5a, 5b Center-to-center (center-to-center) spacing can vary from 97.5mm to 205mm per pitch.

Fig. 14 shows the first position corresponding to the adjustment of the distance between the small distances in the top view and the rear view of the handlebar. This spacing position is combined with the first armrest forming part 5a by shifting the bracket support 24b to the right in one hand and by fixing this on the left side of the crossbar 2 in the pair of holes 37b, 37'b (only the hole 37b shown to avoid making the diagram difficult to read), and in the other hand engage the first armrest forming part 5b by shifting the bracket support 24a to the left and by securing this in the hole to the right of the crossbar 2 37a, 37'a pair (only hole 37a is shown to avoid making the drawing difficult to read) are obtained. Fig. 14b shows another adjustment position corresponding to the distance between the maximum distances in the top view and the rear view of the handlebar. This maximum distance position is in one hand by engaging the first armrest forming part 5b by shifting the bracket support 24a to the left and by fixing this on the left side of the crossbar 2 in the pair of holes 36a, 36'a (holes only 36a is shown to avoid making the drawing difficult to read), and in the other hand, engage the first armrest forming part 5a by shifting the bracket support 24b to the right and by securing this on the left side of the crossbar 2 A pair of holes 36b, 36'b (only hole 36b is shown to avoid making the drawing difficult to read) is obtained.

The adjustment system further advantageously allows adjustment of the inclination of each first armrest forming part 5 a , 5 b by rotation about an axis substantially parallel to the longitudinal axis of the crossbar 2 . As can be seen in Figure 15, adjustment of the support angle of the front arm is possible by the cooperation of the convex surface below the bracket 23a with the upper surface of the bottom 35a of the bracket support 24a. The marking 41a on the bracket 23a facing the graduated scale 42a on the bracket support 24a advantageously allows the cyclist to be assisted in the adjustment of the support angle of the forearm. In a preferred embodiment, the angle of inclination may vary from 0° to 12°.

The adjustment systems thus allow several possible adjustments for the position of the first armrest forming parts 5a, 5b (and consequently the extension means 4a, 4b), namely: The adjustment of the up and down translation allows the adjustment of the height of each first armrest forming part 5a, 5b with respect to the crossbar 2 of the handlebar 1; The adjustment of the forward and backward translation along the axis XX' allows the adjustment of each first armrest forming part 5a, 5b with respect to the crossbar 2 of the handlebar 1 to be set more or less forward or backward; The adjustment of left and right translation allows the adjustment of the distance between the first elbow rest forming parts 5a, 5b along the crossbar 2 of the handlebar 1; The adjustment of the rotation in the horizontal plane allows the adjustment of the toe angle θ between the two extension devices 4a, 4b; Adjustment of the rotation of the bracket in the associated bracket support allows adjustment of the support angle of the forearm with respect to horizontal.

Of course, simplified adjustment systems which offer only a part of the above adjustment possibilities are also conceivable.

Other embodiments are also conceivable for specific adaptations. In particular, the fixing system comprising the fixing ring clamping the crossbar of the handlebar makes it possible to simultaneously adjust the distance between the extension means along the support angle of the bar and the forearm.

1‧‧‧handlebar 2‧‧‧cross bar 3a‧‧‧handle 3b‧‧‧handle 4a‧‧‧First left extension device 4b‧‧‧Second right extension device 5a‧‧‧The first armrest forming part 5b‧‧‧The first armrest forming part 6a‧‧‧Longitudinal extension 6b‧‧‧Longitudinal extension 7a‧‧‧Cover 7b‧‧‧Cover 8a‧‧‧Second extension forming part 8b‧‧‧Second extension forming part 9a‧‧‧Bottom plate 9b‧‧‧Bottom plate 10a‧‧‧Screws 10b‧‧‧Screws 10’a‧‧‧Screw 10’b‧‧‧Screw 11a‧‧‧top plate 11b‧‧‧top plate 12a‧‧‧drilling 12b‧‧‧drilling 13a‧‧‧opening 13b‧‧‧opening 14‧‧‧Area 15a‧‧‧through hole 15b‧‧‧through hole 16a‧‧‧handle 16b‧‧‧handle 17‧‧‧Clamp nut 18‧‧‧Thrust washer 19‧‧‧Locking screw 20a‧‧‧fixed ear 20b‧‧‧fixed ear 21a‧‧‧Ergonomic shape 21b‧‧‧Ergonomic shape 22a‧‧‧top plate 22b‧‧‧top plate 23a‧‧‧bracket 23b‧‧‧bracket 24a‧‧‧Bracket support 24b‧‧‧Bracket support 25a‧‧‧Wedge 25b‧‧‧Wedge 26a‧‧‧Wedge 26b‧‧‧Wedge 27a‧‧‧Wedge 27b‧‧‧Wedge 28a‧‧‧Locking screw 28b‧‧‧Locking screw 29a‧‧‧Exclusive area 29b‧‧‧Exclusive area 30a‧‧‧Screw 30b‧‧‧Screw 31a‧‧‧support plate 31b‧‧‧support plate 32a‧‧‧opening 32b‧‧‧opening 33a‧‧‧Graduation mark 34a‧‧‧Case 34b‧‧‧Case 35a‧‧‧bottom 36a‧‧‧hole 36’a‧‧‧hole 36b‧‧‧hole 37a‧‧‧hole 37’a‧‧‧hole 37b‧‧‧hole 38a‧‧‧hole 38’a‧‧‧hole 39a‧‧‧branch 40a‧‧‧through hole 40’a‧‧‧through hole 41a‧‧‧sign 42a‧‧‧Graduation mark

The invention will become more apparent (preferably but not limiting) after reading the ensuing description of an embodiment of an aerodynamic assembly according to the invention, which is made with reference to the accompanying drawings, in which : Figure 1 is an exploded view of the different components of an aerodynamic assembly for a bicycle handlebar according to a preferred embodiment of the present invention; Figure 2 shows the bicycle handlebar and aerodynamic assembly of Figure 1 in the assembled position; Figure 3 is an enlarged view of a part of Figure 1; Figures 4 and 5 show perspective and front views of an example of a cyclist's forearm and hand pose on the handlebar-equipped aerodynamic assembly of Figure 2; Figure 6 is a sectional view along the AA plane of Figure 5; Fig. 7 is a sectional view along the BB plane of Fig. 5; Figures 8a and 8b show front views of two examples of poses of the extension device fitted on the handlebar of Figure 1; Figure 9 is a partial exploded view showing the possibility of adjusting the height of the aerodynamic assembly on the handlebar of the bicycle in Figure 1; Figures 10a and 10b above show two examples of forward and backward adjustment of the extension device of Figure 1; Figure 11 is an enlarged top view of a portion of the extension device of Figure 1; The upper view of Figure 12 shows an example of adjustment of the toe angle between two extension devices; Figure 13 is an enlarged view of the bracket support in Figure 1; Figure 14a shows an example of the adjustment of the distance between the two extension devices in Figure 1 from the upper and rear views; Figure 14b shows another example of the adjustment of the distance between the two extension devices in Figure 1 from the top view and rear view; Fig. 15 is an enlarged view of a part of Fig. 1, showing the possibility of adjusting the support angle of the forearm.

1‧‧‧handlebar

3a‧‧‧handle

3b‧‧‧handle

4a‧‧‧First left extension device

4b‧‧‧Second right extension device

5a‧‧‧The first armrest forming part

5b‧‧‧The first armrest forming part

6a‧‧‧Longitudinal extension

6b‧‧‧Longitudinal extension

7a‧‧‧Cover

7b‧‧‧Cover

8a‧‧‧Second extension forming part

8b‧‧‧Second extension forming part

16a‧‧‧handle

16b‧‧‧handle

21a‧‧‧Ergonomic shape

21b‧‧‧Ergonomic shape

Claims (18)

An aerodynamic assembly for a bicycle handlebar, the aerodynamic assembly comprising two different extension devices (4a, 4b) forming a first left extension device (4a) and a second right extension Device (4b), characterized in that each of the two extension means (4a, 4b) comprises: a first armrest forming part (5a, 5b) capable of being fixed to a bicycle when extending longitudinally forward On the crossbar (2) of the handlebar (1), and including a longitudinal extension (6a, 6b) extending from the first armrest forming part (5a, 5b) to form the A free end of a first armrest forming part (5a, 5b) which forms with the upper surface of the longitudinal extension a receiving surface for a part of the forearm of a cyclist; and a second extension forming Parts (8a, 8b) that can be fixed to the free end in a movable manner and in the longitudinal extension of the first armrest forming part (5a, 5b), the second extension forming part (8a, 5b) 8b) is longitudinally slidable relative to the longitudinal extension (6a, 6b) to allow separation of the free end of the second extension forming part (8a, 8b) from the first armrest forming part (5a, 5b) distance adjustment. Aerodynamic assembly for bicycle handlebars according to claim 1, wherein, for each of the two extension means (4a, 4b), on the second extension forming part (8a, 8b) The surface is substantially in the extension of the upper surface of the first armrest forming part (5a, 5b) to longitudinally increase the receiving surface for each forearm of the cyclist. Aerodynamic assembly for bicycle handlebars according to claim 2, wherein, for each of the two extension devices (4a, 4b), the first armrest forming part (5a, 5b) The upper surface and the upper surface of the second extension forming part (8a, 8b) are substantially flat. Aerodynamic assembly for bicycle handlebars according to claim 2, wherein, for each of the two extension devices (4a, 4b), the first armrest forming part (5a, 5b) The upper surface and the upper surface of the second extension forming member (8a, 8b) are concave to conform to the shape of the forearm. The aerodynamic assembly for a bicycle handlebar according to any one of claims 1 to 4, wherein, for each of the two extension devices (4a, 4b), the second extension forming part ( 8a, 8b) lower surface is substantially in the extension of the lower surface of the longitudinal extension (6a, 6b), and wherein the lower surface of the second extension forming part (8a, 8b) and the longitudinal extension The lower surface of (6a, 6b) is convex. The aerodynamic assembly for a bicycle handlebar according to any one of claims 1 to 4, wherein, for each of the two extension devices (4a, 4b), the second extension forming part ( 8a, 8b) and the longitudinal extensions (6a, 6b) have complementary cross-sections. Aerodynamic assembly for bicycle handlebars according to claim 6, wherein, for each of the two extension means (4a, 4b), the complementary cross-section (14) is substantially triangular. The aerodynamic assembly for a bicycle handlebar according to any one of claims 1 to 4, wherein, for each of the two extension devices (4a, 4b), the second extension forming part ( 8a, 8b) can be fixed and slide longitudinally inside the longitudinal extension (6a, 6b). An aerodynamic assembly for a bicycle handlebar according to any one of claims 1 to 4, wherein, for each of the two extension means, the second extension forming part can be fixed and longitudinally slides on the exterior of the longitudinal extension. Aerodynamic assembly for bicycle handlebars according to any one of claims 1 to 4, wherein, for each of the two extension means (4a, 4b), the first armrest forming part (5a, 5b) are configured to be fixed to the bicycle handlebar (1) with an adjustment system. The aerodynamic assembly for a bicycle handlebar according to claim 10, wherein each of the adjustment systems can make at least one of the following adjustments: adjustment of up and down translation, allowing the first elbow rest forming part ( 5a, 5b) adjustment of the height of the crossbar (2) each with respect to the bicycle handlebar (1); The adjustment of forward and backward translation allows the first armrest forming parts (5a, 5b) to set more or less front or rear adjustments with respect to the crossbar (2) of the bicycle handlebar (1); the adjustment of left and right translation allows Adjustment of the spacing of the first armrest forming parts (5a, 5b) along the crossbar (2) of the bicycle handlebar (1); adjustment of rotation in the horizontal plane, allowed in the two extension devices (4a, 4b) The adjustment of the toe angle between; the adjustment of the rotation, allowing the adjustment of the support angle of the forearm with respect to the horizontal. The aerodynamic assembly for a bicycle handlebar according to any one of claims 1 to 4, wherein each of the two extension devices (4a, 4b) includes a The foam cover (7a, 7b) of the containing surface. The aerodynamic assembly for a bicycle handlebar according to any one of claims 1 to 4, wherein, for each of the two extension devices (4a, 4b), the second extension forming part ( One end of 8a, 8b) is flattened and has an ergonomic shape (21a, 21b) in which the palm of the cyclist can be supported. Aerodynamic assembly for bicycle handlebars according to claim 13, wherein the flattened end portions are each provided with through holes (15a, 15b) allowing the handlebars (16a, 16b) to move fixed. The aerodynamic assembly for bicycle handlebars according to claim 14, wherein the handlebars (16a, 16b) are each pivotally assembled. The aerodynamic assembly for bicycle handlebars according to item 14 of the scope of patent application, wherein each of the handles (16a, 16b) includes a gripping part and a fixing ear at the lower part, and the gripping parts and The ears are angled. The aerodynamic assembly for bicycle handlebars according to claim 14, wherein the handles (16a, 16b) are interchangeable to adjust the toe angle between the handles. A bicycle handlebar is characterized in that it includes two extension devices for an aerodynamic assembly for a bicycle handlebar according to any one of items 1 to 17 of the patent scope of the application.

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